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Distribution of positive and negative results by serology assay
| Roche anti-SARS-CoV-2 result | Abbott SARS-CoV-2 IgG (n) |
Percentage agreement | κa Statistic (95% CI) | ||
|---|---|---|---|---|---|
| Positive result | Negative or grayzone result | Total | |||
| Positive | 218 | 329 | 547 | 93.9 | 0.53 (0.48–0.57) |
| Negative | 24 | 5,216 | 5,240 | ||
| Total | 242 | 5545 | 5,787 | ||
κ, Cohen’s kappa.
